64973808 has 30 divisors (see below), whose sum is σ = 181836824. Its totient is φ = 21657888.

The previous prime is 64973803. The next prime is 64973819. The reversal of 64973808 is 80837946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64973803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225460 + ... + 225747.

Almost surely, 2^64973808 is an apocalyptic number.

It is an amenable number.

64973808 is an abundant number, since it is smaller than the sum of its proper divisors (116863016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64973808 is a wasteful number, since it uses less digits than its factorization.

64973808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451221 (or 451212 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 64973808 is about 8060.6332257460. The cubic root of 64973808 is about 402.0185630397.

The spelling of 64973808 in words is "sixty-four million, nine hundred seventy-three thousand, eight hundred eight".